Breather-tube and cap therefor.



J. B. FISHER. BREATHER TUBE AND CAP THEREFOR. APPLICATION FILED MAY 1661917- Patented Apr. 1, 19191.'

. 1- f FISHER, 0F WAUKESHA, WISCONSIN, ASSIGNOR' TO WAUKESHA MOTOR OF WAIUKA, WISCONSIN, A CORPOTION OF WISCONSIN.

CHER-TUBE AND 0A.? THEOR.

messes.

, To all whom it may concern:

- State of Wisconsin, have invented a certain new and useful Improvement in Breather- Tubes and Ca s Therefore, of which the following is a fiill, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

The present invention relates broadly to internal combustion engines, and has particular reference to new and useful improvements in breather caps for use in connection therewith.

The device known as a breather is -in stalled on the crank case of the engine and its function is to permit the introduction of the required amount of lubricating oil to the case and to permit the escape of gases from the crankv case without the escape of oil. A detachable cap is usually provided for the breather. However, this cap very often becomes lost or when hinged to the breather is left open and consequently an amount of sand and other foreign matter enters the crank case impairing the eihciency of the lubricant, necessitating frequent cleaning.

An object of my invention is to provide a new and improved cap and retainer for association with the breather to reduce the cost of manufacture of the same and increase its efiiciency. When hinged caps are employed the projection of the hinge parts very often are located in the way of other parts of the engine, and therefore another object of my invention is to provide a breather ca and fastening which may be adjusted to di erent positions so as not to interfere with the other parts of the engine. 1

While the improvement of my invention has particular reference to a breather cap, my invention also extends to the entire struc ture of the breather which is compact, strong and durable, cheap to manufacture and capable of installationin any position in which the present hreatheu'm'ay be installed.

Other objects and advantages of my invention not hereinbefore set forth will appear from the following dc tailed description of the same, taken with an inspection of the accompanying drawings.

Figure 1 is a fragmental elevational view Specification of Letters'Patent.

of one side of an internal combustion engine showing the usual position of the breather Patented Apr. a, rare.

Application filed may 18, 1917. Serial IE0. 188,997. I

embodying the improvement of myinven tion; I

Fig. 2 is a vertical section of the breather "showing the cap in closed position; and

Referring more particularly to the drawings, wherein similar characters of reference designate like and corresponding parts throughout the various views and referring specifically to Fig. 1, "1 have illustrated a portion of an internal combustion engine structure showin the cylinders, a portion of the crankcase, esignated respectively, C and C. The breather is mounted adjacent the cylinder on the crank case and is designated B in its entirety, the breather shown being that of my invention.

The breather of my invention preferably embodies a tubular body 10 having the lower end thereof externally threaded as at 11 for reception in an opening provided in the crank case, a flange 12 being' formed adjacent the threaded portion to imit the inward movement of the body. A plurality of downwardly directed haffle plates 13, 14 and 15 are provided on the interior peripheral base of the tubular body. The body has been shown as cylindrical, but, of course, this is not strictly essential, The upper end of the body is flared as at 16 to provide a mouth, the mouth being strengthened by an enlarged ridge or flange 17. The portion of the mouth below the flange 17 is polygonal in shape as at 18 so as to receive a wrench or the like for screwing the body into position.

The cap or closure is supported by detachable means comprising the lug 1-9 formedintegrally with the body 10 and projecting radially lnteriorlv thereof, said lug being provided with a threaded openi 20 in aimement with the longitudinal axis of the body. A sleeve 21 is provided, one end of the sleeve being threaded as at 22 for reception in the opening 20, the free end of the sleeve projects a trifle beyond the top of the cap 28 to prevent th cap from rattlm when cl The sleeve 21 is intends to receive the cap carrying rod 24, said rod having one free end thereof provided with a notch 25 and the opposite free end, thereof provided with an eye 26, the rod being curved laterally as at 2? for a purpose which will crosssection and is 'centric sleeve hereinafter appear.

The notched end of the rod is adapted for reception in the sleeve and is therefore slightly bowed so that when the same is forced into the sleeve the bolt portion will cause the notch on the end of the rod to engage under the end of the sleeve. The curved portion 27 of the rod willlimit the downward movement of the rod in the sleeve, but will permit rotative movement of said rod in said sleeve. I

The'closure or cap 28 is concavo-convex 111 provided with a conportion 29'provided with a bore 30. A seating flange 31 is formed preferably on the margin of said cap. The sleeve 21 is receivable in the bore 30 of the cap and the cap is adapted to be moved upon said rod to open and close the mouth of the breather.

In use the breather is installed as shown in Fig. 1. To fill the crankcase with a lubricant the cap is moved into the dotted line position shown in Fig. 2. Should the user neglect to close the cap the first few revolutions of the engine will, owing to the vibration, cause the cap to fall into the closed position.

Of course the breather is not limited to the "use set. forth, but is capable of application to various driving and driven devices having oil chambers or the like in which gases are. apt to gather. However, the device is primarily designed to take care of the gases in the crankcase of an internal combustion engine whichfwould otherwise escape elsewhere carrying the lubricant with it. When the engine is running and any gas collects in the crankcase, such gas may readily escape by forcing open the cap, said cap at the same time preventing the entrance I of dust, sand or other foreign matter to the receivable in said openin I sleeve, an

1 vided with a thereof a l t-1g n said body having a threaded opening, sleeve receivable in said opencrank case. The device may be assembled quickly and the rod 2 L a horizontal plane so parts of the engine.

I do not limit my invention to the exact details of structure disclosed but reserve the right to make such changes therein as do not is adjustable through as to escape adjacent .depart from the spirit and scope of the invention as claime c aim:

- 1. In combination, a breather tube having a plurality of bafiies on the inner surface thereof, a lug projecting interiorly radially openin tudinal therein concentric with the longiaxis of the tube, a

and projecting from the upper end of said rod havin a notched end receivable in said a cap receivable on said rod. 2. In combination, a tubular body prolurahty of battles interiorly ing toward the mouth,

said rod being bowed of the tube and having a threaded threaded sleeve tubular body,

tube, a curveding, a curved rod for reception in said sleeve,

, an apertured cap receivable on the rod and a tubular body proof bafiies on the inner said body having a a sleeve receivable in said opening, a curved rod for reception in said sleeve, a cap havin an aperture through which said rod is a apted to pass, said cap being slidablevertically and laterally on the rod, means to limit the movement outwardly of said cap on said rod, and means to retain said rod in said sleeve.

4. In combination, a tubular body having a flaring mouth and a lu formed interiorly of the body, said lug opening concentric with the longitudinal axis of the body, a sleeve anchored in said openin and extending toward the mouth, a rod aving vertical and lateral portions, the former portions being receivable/ in said sleeve, and having a notch to engage under the end of the sleeve, a closure cap receivable on the sleeve and rod and the free end of said rod being formed to retain said cap against displacement.

In combination, a tubular body having a threaded end and a flarin mouth and a lug formed interiorly thereof; said lug having a threaded opening concentric withthe longitudinal axis of the body, said body being receivable on a crank case or the like, a sleeve anchored in said opening and extenda rod having lateral and vertical portions, the lateral portion rece ivable in said sleeve, means on the rod-to engage the sleeve the vertical portion of so as to cause said means to engage said sleeve, a cap receivable on the rod and adapted to be disposed on the lateral portion thereof when in o ened position and means on thefree end of the rod to prevent displacement of the cap.

6. In combination, -'a breather having a plurality of battle plates mounted on the inner periphery and a radially extending .lug mounted at the upper end, said lu having an aperture there n, a rod adapte to be mounted in said aperture, a cap slidably mounted on said rod and adapted to adjust its position in relation to the internal condition of said breather;

7. In a breather of the kind described, a a lug formed on the inner face of the body, fixed supporting means extendingaxially from said lug and an apertured closure for said body shdable on said supporting means, and normally seating on the mouth of said tubular body. 4

8. In a breather of the kind described, a

tubular body, a lug on the inner face of the body, fixed closure-retaining means extendaving a threaded I ing axially from said lug, a closure freely movable on said retaining means and normally seating on said tubular body.

9. In -a breather of the kind described, a tubular body having a mouth, a lug formed on the inner. face of the body, fixed supporting means extending axially from said lug, a closure for said mouth freely movable vertically on said supporting means and adapted to be held on its seat by gravity.

10. In a breather of the kind described, a tubular body having a mouth, a lug formed on the inner face of the body, a closure for said mouth, means carried by said lug for guiding the closure to one side as it is raised, said guide means being circumfer entially adjustable.

11. In a breather having a breather-opening, a closure therefor adapted normally to rest in closed position, means for retaining said closure centrally relatively to said opening, guide means extending through the closure for positioning it at one side of the opening when lifted, said closure being freely returnable to closed position by gravity.

12. In a breather having a breather opening, a closure for said opening, meanspreventing lateral displacement of the closure when in closingposition, guide means projecting through the closure and adapted to position the closure at one side of the breather when lifted, said closure being freely returnable from its open position to its closing position by gravity.

13. In a breather having a breather opening, a closure for said opening, fixed means preventing lateral displacement of the 010- sure when in closing position, a curved guide rod extending through the closure for positioning the closure at one side of the breather when raised to open position, said closure beingadapted to ,be easily dislodged from its open position by a slight jar.

In witness whereof, I hereunto subscribe my name this 9th day of April, A. D. 1917.

JAMES BLAINE FISHER. 

